Well, of course this depends on what means "expensive" to you... But generally it's important to know that First Class on Titanic doesn't mean "for the richest only". The prices for FC tickets varied from about 150 $ in a simple cabin to about 4200 $ for the most expensive suites. According to inflation calculators this would mean from 3200 $ up to about 90000 $ in current value. And that's still quite a lot of money I would say.